1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb985c71d0945f4a57ffa41497792026e5b74836616b65d1853b6fd96487e2f08. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a91b722-85c9-46d3-89d8-a2ae74fe235e.json and https://artists.proofprofile.net/proofs/artist/0a91b722-85c9-46d3-89d8-a2ae74fe235e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ac459f12d5404a5aad32d33aa56423d57941b24a51aaba1141484eebb977ad. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR0E32400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbeac883fb8b6bb61faee9bca10bacff30d8efb22035f5e003dd10eacd277b6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR0E32400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e011a78a0ccdd57e718d11bbeac2b3f54bb1b627891cc0bf12e51d58c6bda3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR0E32400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35720d291ba3d68a2893bca8a9f6a9769f3ad099a45a9a4757b37a5ac19da394. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR0E32400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324ce4946ba83873304965e4b4296d3275c74d59db226223f2aa1b79229f7316. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR0E32400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc004f628d640dc7739fb2c58a7efcbafd1e3c2fe2f2e2a9ce27c35a69b270283. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR0E32400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde4574750c87abf21845b658a1f42f914d72aa977c2b39c264e9cbd036bced1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR0E32400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae24863b7bffb436453770c23d22dc5a41a2ab72b36e14880f8ef589d05c9614. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR0E32400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a2f8cc75e20c1f71b0e4cea3b63888d9144a120ec3d4b8cbed843339589ba6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AR0E32400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5bb0e25f6de99a687a8861a4e7da3e91f558880e597fc7af66a568e1630214. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM42K2399318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d385ccd852e1c9d49c88cf751b2e83347a3d0d03513c214a95ba8c5cbcbd8d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHK2340556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382f9b5bb55bdf4b8a6a3826b9f4c06208bf5c546d705ad725c7ed11e1c0fc49. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM42K2345857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a06a9f5f4d42b5d1f6de347c172a2294ee853480ce53bb306676753f027d1b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHN2358570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bef482cf7dd0a7b4d7a1636611c2cdae1faf8ca9dd531acac054a7f52a77422. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM42K2339677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63e6f388a150de3a4cc6c6837980391a1b8c443fd040007e21671798740b1e7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS642311835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333d3faf97a6b1b19d036ec7aa86c0a219fa6c29b82c32941f9837e6afb6d761. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS642377620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6614a8d4b4d3508c04cfd13138db7ef5e2453f7ae265687ce82510b4e78aedc2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHM2328496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfa1e542610c54ce2aba1cd1172c0a2831c9e05342f2d624150c1dc6389b2b2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMHL2387283.